Hackers have used the security bug in widnows to spread and infect Duqu virus, This virus was discovered by Symantec last month and was reported as a next big cyber security threat.
“We are working diligently to address this issue and will release a security update for customers,” Microsoft said in a statement.
Microsoft did not reveal any details of the virus and how it is infecting users. But Symantec had repotted that Duqu was initially infecting systems through a compromised Microsoft Word document which installs the malicious software after it’s opened.
This virus is spreading rapidly and infecting computers. It has been confirmed in several countries, including France, Netherlands, Switzerland, India, Iran, Ukraine, Sudan and Vietnam.
Read report here
http://www.symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploit